Wollastonite Fiber, 5.5μm

Catalog NumberACFR000047

CategoryFunctional Inorganic Powder

Description	Wollastonite Fiber is made from natural wollastonite ore through advanced grinding technology and modification treatment, with calcium silicate as its main component and the molecular formula CaSiO₃. Its theoretical chemical composition is 48.3% CaO and 51.7% SiO₂.
Melting Point	1540℃
Appearance	white or gray
Application	It is widely applied in various fields, including ceramics, chemical industry, metallurgy and papermaking. It is also suitable for nylon, polyurethane, polypropylene (PP), thermoplastic olefin (TPO), liquid crystal polymer (LCP), PBT/PET polyester, epoxy resin and phenolic plastic products, playing roles in reinforcement, performance improvement and cost reduction.
CaO	40-50%
Fe₂O₃	≤ 0.3%
Feature	It is insoluble in alkali but soluble in strong acids, with stronger chemical inertness than calcium carbonate (CaCO3). Its special crystal structure endows it with good insulation, dielectric properties, high heat resistance and weather resistance, making it widely used in ceramics, chemical industry, metallurgy, papermaking, plastics, coatings, rubber and other fields.
Hardness	Mohs hardness of 4.5~5.5
Ignition Loss	≤ 4.0%
Particle Size	5.5±1.0μm
SiO₂	44-56%
Specific Gravity	2.78~2.91
Thermal Expansion Coefficient	6.5×10-6mm/(mm·℃) at 25-800℃
Volatiles	≤ 0.5%
Whiteness	≥88%

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